Asteroids with Satellites Database--Johnston's Archive
(6615)
Plutarchos
compiled by Wm. Robert Johnston
last updated
29 May 2019
--Orbital and physical data--
(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)
dynamical type, primary:
main belt asteroid
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.169992956 AU
| |
orbital period P: |
3.196654418 yr
(= 1167.578026 d)
| |
eccentricity e: |
0.126321037
| |
perihelion distance q: |
1.895877194 AU
| |
aphelion distance Q: |
2.444108717 AU
| |
inclination i: |
1.796946401°
| |
argument of perihelion ω: |
81.27916493°
| |
ascending node Ω: |
129.3661601°
| |
mean anomaly M: |
63.20408129°
| |
perihelion passage TP: |
2013 Oct 30.01195
| |
Epoch: |
2014 May 23
| |
data arc: |
1960-2013
(964 obs.)
| |
Earth MOID: |
0.891599 AU
| |
Jupiter Tisserand invariant TJ: |
3.678
|
orbital data, secondary:
|
binary dynamical type: | A [M09a] | |
semimajor axis as: |
9.4
km
[*E]
| |
separation/primary radius as/rp: | 6.2 [*E] | |
separation/Hill radius as/rH: | 0.021 [*E] | |
orbital period Ps: |
1.668
± 0.004
d [O07a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
1.59
[M09a]
|
|
other data, system (combined):
|
absolute mag. H: |
14.6
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.14
± 0.04
km [M11b]
| |
geometric albedo: |
0.412
± 0.066
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
450 km [*E]
|
other data, primary:
|
diameter dp: |
3.04
± 0.04
km [*D]
| |
rotation period RPp: |
2.3247
± 0.0001
h [O07a]
| |
amplitude in mag., rotational ΔM: |
0.06
± 0.01
[O07a]
| |
amplitude in mag., mutual events ΔM: | 0.07 [O07a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.79
± 0.09
km [*D]
| |
diameter ratio ds/dp: |
0.26
± 0.03
[W17a]
| |
component mag. difference ΔM: |
2.93
± 0.25
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(6615) Plutarchos
--discovery and notes:
Primary discovered
1960 Oct 17
from
Palomar Observatory, California, USA
by
C. J. van Houten, I. van Houten-Groeneveld, and T. Gehrels.
Alternate designation(s):
9512 P-L,
1991 EW.
Permanent number assigned 1995 Oct 08.
Named 1996 Apr 04 for Plutarchos (~45-125 AD) [MPC026932].
Companion discovered
2007 Apr 14
using
lightcurve
observations.
Announced
2007 Oct .
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2007-2017, 2019
by Wm. Robert Johnston.
Last modified
29 May 2019.
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